下列哪些情况可使血液黏度增高（）。
A.血流速度慢
B.血细胞比容大
C.血浆纤维蛋白原和球蛋白增高
D.红细胞变形性下降
E.温度升高
参考答案：A, B, C, D
解析：血液是由血浆、血细胞和血小板这三部分组成血浆中有水、蛋白质、糖、脂肪、无机盐、纤维蛋白原等；血细胞主要是红细胞和白细胞，白细胞又分淋巴细胞、单核细胞和中性、嗜碱性、嗜酸性三种白细胞，血小板则是与血黏度关系最密切临床上有不少人血脂不高，但却有血黏度增高，故而同样会导致心肌梗死和脑梗死有的是中性白细胞增多，有的是血小板增多和淋巴细胞的变化，有的是高原缺氧引起的红细胞过多，有的是某种食物过敏引起的嗜酸性细胞过多，有的是血浆中纤维蛋白原过多，有的是血液中免疫球蛋白过多或免疫复合物清除不力，有的是好嗜咸，血液中盐分过高甚至有因大量出汗或腹泻造成脱水，血液浓缩而造成血黏度增高。
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| We sometimes call the lion“the king of the jungle”because it is stronger and more dangerous than other animals. 1 It is the highest animal in the land food chain. In the sea, the shark is one of the animals at the top of the food chain. It can swim faster than most other sea animals. 2 3 People are! We are not the biggest or fastest, but we are the cleverest. We could not run faster than cheetahs, so we invented cars and now we can move the fastest. We could not fight better than lions, so we invented guns. Now we can hunt the best. People’s inventions are clever, but they can be dangerous, too. For example, people invented factories, and now they make the air and rivers dirty. 4 Dirty rivers kill fish, then bears cannot eat the fish and die. If we kill one part of the food chain, other parts also die. Rememberthat we are part of the food chain, so we are in danger, too! 5 We should and we could do something for the world!
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